Wrench



April 22, 1930.

A. o. NORTH WRENCH Original Filed NO v. 3, 1926 WITNESS:

XNVENTOR mmjw ATTORN EY Patented Apr. 22, 1930 UNITED STATES ARTHUR ORLANDO NORTH, OF NIAGARA FALLS, NEW 'YORK WRENCH Application' led November 3, 1926, Serial No. 146,007. Renewed February 8, 1930.y

This invention relates to a motor-operated wrench. In assembling automobile parts or making repairs to the same much loss of time is occasioned by removal of the numerous nuts engaging the bolts, securing cylinder heads, or locking minor parts together, In

order to avoid loosening of the nuts duringA the jolts of trafHc-they are drawn very tight so as to give a tight frictional grip against I the adjacent surfaces andto remove the nut socket wrench may be applied quickly to a considerable number and will automatically disengage them from their bolts. The `wrenches may be instantly exchanged from the motor clutch so that the entire work of removal of the nuts is very much minimized. The socket I prefer to employ is one with a long hollow chamber suicient to store a considerable number of nuts, andthe wrench is adaptedfor instant application over any one of a group of definite sized nuts, the wrench applied and they are disengaged and simultaneously stored.

The invention involves also the additional feature of a slippable connection between the motor and the wrench by which the magazine sockets may be quickly applied or exchanged. I have found that a very small electric motor is suilicient for practical use to effect the end sought.

My invention, therefore, consists of a hollow socket wrench with a storage magazine for nuts detachably connected by a slip connection with a chuck on a motor shaft, so that it may be readily applied to-a group of eased nuts torrapi'dly withdraw and store them. The invention comprises other more speciiic features, the novelty of which will be hereinafter described and be deiinitely indicated in the appended claim.

V In the accompanying drawings:

Figure 1 is a side view of an implement embodying my improvements connected with asmall portable electric motor by a quickly detachable clutch. l

Figure 2 is a median sectional view showingthe construction of my wrench in relation to a chuck on a motor shaft.

Figure 3 is a cross section on the plane 3 3 of Figure 2. y;

Figure 4 is a section on plane 4-4 of Figure 2.

Referring now in particular to the drawings, 1 represents a small portable electric motor with a high resistance winding adapted to operate under small amperage with a connecting plug and flexible cord for attachment to a commercial circuit. The cord per- -mits the motor to be carried by the handle 2 to a desired part of the machine being worked on and the motor shaft carries a chuck to grip the hexagon tip 3 of my improved wrench. A convenient form of chuck is shown at 4 having a tapered mouth with a pair of pivotal jaws 5, 6 angular on their gripping face to coact with the hexagonal tip 3. It will be apparent that when the motor shaft 7 is rotated the socket wrench will be rotated. The upper part of this is provided with a hexagonal shoulder 8 on which is mounted with light frictional engagement a socket tube 9, the body of which forms a magazine to store a number of nuts. This tube may be from 6 to 12 inches in length to afford sufficient capacity and its lower end has a heXagon faced mouth to take in a 'standard sized nut. Fixed in the head 8 is a spindle 10 provided at its bottom with a pair of split jaws 11, 11a adapted to enter the thread of a nut. The head 8 is drilled centrally and transversely with a small hole in which nests a pair of spiral springs 12, 12* coac @with a pair of steel balls, and the tube Afilled with a pluralit of openings 13 of smaller size than the alls. When, therefore, the tube 9 is laced over the head 8 the balls will be force inwardly against the thrust of the springs and a slip connection will be afforded by w ich the ma azine may be quickl attached and detac ed. The bottom o the magazine is of reduced diameter thus permitting free axial movement of the stored l nuts. I provide a plurality of holes 13 by which on pushing on the sockets, the balls yield'under spring pressure radially and a.f ford quick attachment and detachment of a socket or magazine. After starting the nut by applying the Wrench as indicated at 14, a downward pressure will bring the jaws of the lug 1l into engagement with the thread of the nut andl starting the motor will quickly raise the nut within the Socket and the socket may be instantly applied to another nut for storing. l

I have hereinbefore described the best form I I have hitherto provided for carrying out my invention, asrequired by the statutes, but I wish it to be understood thatdetailed changes may be made inthe structure to carry out the functions described without departing from the scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: Y

In a motor driven magazine socket wrench, a polygonal tip, a polygonal head forming a shoulder on the tip and driven by a chuck, a hollow' polygonal socket of reduced size at its bottom and adapted to form a nut magazine, the reduced end of which forms a wrench socket, a pair of anti-friction balls spring seated in holes -in the head to engage the socket )to permit ready detachment, and a central spindle iixed in the headand having sprlng jaws at its bottom to guide freed nuts in the socket.

In testimony whereof I aiixm signature. v

ARTHUR omQANDo ORTH.l 

